Shunting locomotive modular cab floor beam structure

The invention relates to a shunting cab internal structure, in particular to a shunting locomotive modular cab floor beam structure which comprises a bottom sealing plate; a plurality of reinforcing longitudinal beams are arranged on the bottom sealing plate; reinforcing cross beams are arranged above the reinforcing longitudinal beams, and box type longitudinal beams are further arranged at the two ends of the reinforcing cross beams respectively. At least one reinforcing longitudinal beam is located on the bottom sealing plate below the box type longitudinal beams, and floor beam supportingstructures are arranged between the reinforcing longitudinal beams and the box type longitudinal beams and between the reinforcing longitudinal beams and the reinforcing cross beams. By arranging thestructures such as the reinforcing longitudinal beams and the reinforcing cross beams which are connected and combined with one another, the floor beams are better in integrality, higher in structuralstrength and higher in rig